JPH0525004A - Crop harvesting agent - Google Patents

Abstract

(57) [Summary] [Object] An object of the present invention is to provide a crop harvesting agent comprising kojic acid or a salt thereof as an active ingredient. [Structure] The crop yield-increasing agent of the present invention containing kojic acid or a salt thereof as an active ingredient is sprayed on the foliage of the crop, or is irrigated under the crop plant, for example, a hydroponic solution in hydroponics. The rooting of the crops and the initial stage of the foliage by dipping the seedlings before transplantation into the seedlings by directly dipping the seedlings into the seedlings of the crops, or by treating the seeds of the crops It promotes growth and flowering, which results in increased crop yield and improved crop quality.

Description

Detailed Description of the Invention

[0001]

[Object of the Invention]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crop harvesting agent containing kojic acid or a salt thereof as an active ingredient. Therefore, the present invention can be used in the field of agriculture and horticulture.

[0002]

BACKGROUND OF THE INVENTION Kojic acid (chemical name: 5-oxy-2-oxymethyl-r-pyrone) is a metabolite of Koji bacteria, and is used as a drug (Japanese Patent Publication No. 60-180008),
Foods (JP-A-62-224261), chemical products (JP-A-55-157670), pest control agents (JP-A-1-132502), preservation methods of cut flowers (JP-A-2)
No. 42001). Kojic acid is also known to promote germination of seeds such as peanuts [Chemical Abstracts Vol. 49, 1271 (1955), Chemical Abstracts Vol. 84, 100400h].

However, no crop harvesting agent containing kojic acid or a salt thereof as an active ingredient is known.

On the other hand, fertilizers are exclusively used for increasing the yield of crops, but sometimes a resistance-imparting agent, for example, a lodging reducing agent is used to prevent the yield from falling and to increase the yield.

[0005]

The effect of increasing the yield of crops by conventional chemical substances such as lodging reducing agents and fertilizers is not always satisfactory. For example, fertilizers and the like act effectively on crops cultivated with poor nutrition, but when fertilizers are further applied to crops grown under conditions of sufficient nutrients, growth disorders occur. In addition, the lodging-reducing agent is effective only when the crop is laid down and the yield is reduced because the drug is not treated, and there is no direct yield-increasing action. Therefore, there is a strong demand for the creation of a crop yield-increasing agent that is highly safe and sufficiently satisfactory for crops.

[0006] Therefore, the present invention is to provide a crop harvesting agent having high safety and excellent harvesting effect.

[0007]

[Means for Solving the Problems] In order to solve the above-mentioned problems, the present inventors have tried a number of compounds and have conducted extensive studies. As a result, sprinkle kojic acid or its salt as an active ingredient on the foliage of the crop, or irrigate the crop plant, for example, adding to hydroponics in hydroponics or raising seedlings before transplantation. It has been found that the chemical solution is directly immersed in the root of the crop by a method such as immersing it in the box as it is, or the seeds of the crop are treated so that the effect of the crop harvesting agent is sufficiently exerted.

[0008] That is, the gist of the present invention is a crop yield increasing agent characterized by containing kojic acid or a salt thereof as an active ingredient.

[0009]

【Example】

Example (Formulation and method of use of yield-increasing agent) When formulating the crop yield-increasing agent of the present invention, as the active ingredient of the present invention, kojic acid, which is commercially available, can be used as it is. , Kojic acid with an inorganic base such as potassium hydroxide, sodium hydroxide, calcium hydroxide, magnesium hydroxide or an organic base such as pyridine or triethanolamine to adjust the pH to within the range of 4.5 to 9.0. It is recommended to adjust it before use. Furthermore, the effect of kojic acid does not change even if it is an inorganic salt such as sodium, potassium, calcium, magnesium or the like or a quaternary ammonium salt.

The crop yield-increasing agent of the present invention comprises a liquid carrier, a wettable powder, a hydrated granule, a flowable powder or a powder, a DL powder or a granule, which is prepared by using a liquid carrier, a solid carrier or the like which is commonly used for agricultural chemical preparations. It can also be used in any dosage form such as.

Examples of solid carriers that can be used include mineral powders (clay, bentonite, montmorillonite, talc, calcium carbonate, white carbon, etc.), vegetable powders (soybean flour, wheat flour, wood flour, starch, dextrin, crystalline cellulose, etc.). Glucose, maltose and fructose), polymer compounds (petroleum resin, polyvinyl chloride, ketone resin, etc.), and animal and vegetable waxes.

Examples of liquid carriers that can be used include water,
Alcohols (methyl alcohol, ethyl alcohol,
n-propyl alcohol, iso-propyl alcohol, butanol, benzyl alcohol, etc.), glycols (propylene glycol, propylene glycol monomethyl ether, ethylene glycol, etc.) and the like.

When formulating a wettable powder, a flowable agent, etc., various surfactants and the like can be used, if necessary, for the purpose of dispersing, solubilizing, wetting, foaming, lubricating and spreading. . In this case, as the surfactant, nonionic surfactants (such as polyoxyethylene alkyl ether, polyoxyethylene alkyl ester, polyoxysorbitan alkyl ester and sorbitan alkyl ester), anionic surfactants (alkylbenzene sulfonate, Alkyl sulfosuccinate, alkyl sulfonate, polyoxyethylene alkyl sulfonate, aryl sulfonate, etc., cationic surfactants (lauryl amine, stearyl trimethyl ammonium chloride, alkyl dimethyl benzyl ammonium chloride, polyoxyethylene alkyl) Amine, etc.) and amphoteric surfactants (lauryl betaine, stearyl betaine, etc.), but of course these are not the only examples. .

Further, physical modifiers, decomposition inhibitors, preservatives, antioxidants and the like which are usually used in preparations can also be used.

In using the crop harvesting agent of the present invention,
Existing plant growth regulators, fungicides, insecticides, fertilizers and the like can also be used in combination.

The crop harvesting agent of the present invention can be used at any time from seeds of the crop to immediately before harvest. The dose used is, as the concentration of the active ingredient, for example, in the case of seed soaking, 0.001 to 500 ppm, preferably 0.01 to 100 ppm, and when sprayed on the foliage of a crop, 0.1 to 2000 ppm. , Preferably 1 to 1000 ppm, and when added to a hydroponic solution or the like, the amount is 0.001 to 100 ppm, preferably 0.01 to 50 ppm. And when this is used as a foliar spray for crops, 1 per 10 ares
The amount of 00 to 500 liters may be sprayed. Moreover, when this is used as a granule, a powder, and a DL-type powder in soil of a cultivated area of a crop, about 1 to 3 kg per 10 ares may be treated with the formulation as it is.

The formulation of the present invention will be described in more detail with reference to Examples. However, the present invention is not limited to these examples.

In the examples, all parts are parts by weight.

Example 1 Liquid formulation A liquid formulation was obtained by dissolving 5 parts of kojic acid in 95 parts of water.

Example 2 Wettable powder 20 parts of kojic acid, sodium lignin sulfonate 3
Part, polyoxyethylene nonyl phenyl ether 2
Parts, 2 parts of white carbon and 73 parts of clay are crushed by a hammer mill and mixed to obtain a wettable powder.

Example 3 Hydrated Granules Kojic Acid 20 parts, Sodium Lignin Sulfonate 3
Parts, 2 parts sodium lauryl sulphate and 75 parts clay are ground with a hammer mill and mixed. To this, 15 parts of water is added and kneaded, granulated by an extrusion granulator, dried and sieved to obtain a hydrated granule of 14 to 32 mesh.

Example 4 Granules Kojic acid (10 parts), polyvinyl alcohol (2 parts), sodium ligninsulfonate (3 parts), sodium dodecylbenzenesulfonate (1 part), white carbon (2 parts) and clay (82 parts) were added and mixed with a hammer mill. To this, 15 parts of water is added and kneaded, and granulated by an extrusion granulator. Further, it is dried and sieved to obtain granules of 14 to 32 mesh.

Example 5 Liquid formulation A liquid formulation is obtained by dissolving 5 parts of sodium kojic acid in 95 parts of water.

Example 6 Wettable Powder 20 parts of potassium kojic acid, 3 parts of calcium lignin sulfonate, 2 parts of polyoxyethylene nonylphenyl ether, 2 parts of white carbon and 73 parts of clay were ground by a hammer mill, mixed and hydrated. Get the agent.

Next, the usefulness of the crop harvesting agent of the present invention will be described in more detail by way of test examples.

Test Example 1 Test for Rooting Promotion Effect on Sweet Potato Seedlings The wettable powder prepared according to Example 2 was diluted with water to a predetermined concentration. And, picking sweet potato seedlings (variety: Benikomachi),
Store this in a cool, dark place for 7 days, then add the above chemicals to 500
The cut end of the sweet potato seedling was sufficiently immersed in a plastic pot having a diameter of 11 cm and a height of 15 cm, which had been placed in ml, and was immersed for 24 hours. The seedlings thus treated were not washed with tap water 500
Hydroponics was carried out for another 7 days in the same size plastic pot containing ml.

After 7 days of hydroponic culture, the longest root length, root weight and foliage weight of sweet potato seedlings were investigated to determine the rooting promoting effect.

In this test, 15 bottles were prepared per drug solution concentration group,
This was carried out in triplicate, and the average value was calculated. The results are shown in Table 1.

[0029]

[Table 1] Note 1) A commercially available Suncatch liquid agent was used. Note 2) Numerical values in parentheses in the table are measured values.

Test Example 2 Growth promoting effect on spinach and yield-increasing effect test A liquid preparation prepared according to Example 1 and Example 5 was diluted with water to a predetermined concentration. Then, the foliage of spinach (variety: Pioneer) in the true leaf development stage was sprayed with the above-mentioned chemical solution in an amount equivalent to 150 liters per 10 ares.

Thirty-two days after the treatment, 60 spinach seedlings that had grown moderately from each ward were cut off from the ground, and plant height,
The number of leaves and the yield were investigated, and the growth promoting effect and the yield increasing effect were obtained.

This test was carried out in triplicate with 5 m ² per concentration of the chemical solution, and the average value was obtained. The results are shown in Table 2.

[0033]

[Table 2] Note 1) Numerical values in parentheses in the table indicate measured values. Note 2) Liquid fertilizer has a ratio of nitrogen, phosphoric acid, and potassium of 10:
A composition having a composition of 4: 8 was used.

Test Example 3 Test for increasing yield and improving quality of sweet potato The hydrated granules prepared according to Example 3 were diluted with water to a predetermined concentration. After collecting the seedlings, a sufficient amount of the above chemical solution was sprayed on the foliage of the sweet potato seedlings (cultivar: Benitaka type) stored in a cool dark place for 7 days. The seedlings after spraying were planted by upright cutting in the field.

After 98 days of planting, 40 strains in each ward were dug out to examine the total yield, and the effect of increasing the yield and the effect of improving the quality were determined based on the agricultural standard standard (based on the Kurigen-cho agricultural cooperative selection standard of Chiba Prefecture). Furthermore, for the cut and dried ratio as an index of starch content, measure the biological weight (F) of "potato" sliced in 0.5 cm thickness and the dry matter weight (D) after drying in the sun for 3 days. Was calculated from the following equation.

[Equation 1]

In this test, 50 m ² per one drug solution concentration group was carried out in triplicate, and the average value was obtained. The results are shown in Table 3.

[0037]

[Table 3] Note 1) Numerical values in parentheses in the table indicate measured values.

Test Example 4 Test of initial growth promoting effect on tomato and flowering promoting effect Test The hydrated granule prepared according to Example 3 was diluted to a predetermined concentration, and 100 liters equivalent amount of chemical solution was added per 10 ares.
After 10 days of planting, the foliage was sprayed over the whole tomato (variety: Toko K) strain.

At each time after planting, the plant height, the number of leaves and the number of flowers per 25 strains in each plot were investigated, and the initial growth promoting effect and the flowering promoting effect were obtained.

This test was carried out in triplicate with 18 m ² in 1 group and 30 strains in 1 group. The tomato production type was open-field mulch cultivation and fertilization was managed according to the conventional method. The results are shown in Table 4.
It was shown to.

[0041]

[Table 4] Note) Numerical values in parentheses in the table indicate measured values.

Test Example 5 Test for Fruit Set Acceleration Effect and Quality Improvement Effect Test of Tomato Fruit The wettable powder prepared according to Example 3 and Example 6 was diluted to a predetermined concentration to prepare a tomato (cultivar: Toko K). At the flowering time of 3 to 4 flowers per inflorescence, 2-3 ml of the drug solution was sprayed only on the inflorescence.

Twenty-five strains in each ward were investigated immediately after the treatment until 59 days after the treatment, and the fruit setting rate was determined from the cumulative value for each flower cluster position to determine the fruit setting promoting effect. Fruit quality and fruit weight were investigated for all harvested fruits, and quality improvement effect was sought.

This test was carried out in triplicate with 30 strains in 1 group at 18 m ² per drug solution group, and the average value was obtained. The tomato production type was open-field mulch cultivation and fertilization was managed according to the conventional method. The results are shown in Table 5.

[0045]

[Table 5]

[0046]

INDUSTRIAL APPLICABILITY The crop harvesting agent of the present invention exhibits the effects of promoting rooting, improving the quality and increasing the yield of crops by any treatment method. That is, firstly, the crop harvesting agent of the present invention promotes rooting of crops, promotes early growth of foliage, promotes flowering, and consequently increases yield, and further improves crop quality.

Secondly, it can be used at any time from the seeds of crops to just before harvesting because it has a wide suitable period of use.

Thirdly, the revenue increasing agent of the present invention can be applied to various useful crops such as sweet potato, spinach and tomato.

Fourthly, the crop yield-increasing agent of the present invention does not cause phytotoxicity to crops, does not pollute the environment, and does not adversely affect humans and livestock, so that it can be used safely.

Claims (1)

What is claimed is: 1. A crop harvesting agent, comprising kojic acid or a salt thereof as an active ingredient.